Where they melted all the ice, built an aqua-rocket ship, and flew back, saving the Can and destroying Sparky once and for all.
Only to have his laughs change to hysterical shrieks as they looked up, busted out, and escaped with the Can, leaving poor old Sparky in the dust. When Dernhelm...
But his button was a fake, showing only a recorded video of the Duffers dooing such to a clone of the Can. The REAL Can was being venerated on the high altar of the Duffers...